FLAG OVER THE WHITE HOUSE 1968 SCARCE AYERST COMMERCIAL FDC +ORIGINAL LETTER
AYERST LABORATORIES WAS A PHARMACEUTICAL LAB THAT SENT PROMO MAILINGS TO DOCTORS USING FIRST DAY COVERS TO PROMOTE THEIR DRUGS.
THE AYERST LOGO IS ON THE BACK FLAP OF THE FDC AND THE LETTER TEXT TIES IN THE TOPIC OF THE FDC TO THEIR LATEST OFFERING. SINCE THESE WERE MAILED TO NON-COLLECTORS FEW SURVIVE, AND EVEN LESS WITH THE COMPLETE ORIGINAL LETTER .
FINE- VERY FINE CONDITION - OPEN BACK FLAP - DOCTOR'S ADDRESS ON ENVELOPE MATCHES LETTER SALUTATION
MULTIPLE PURCHASES ARE COMBINED TO SAVE ON POSTAGE COST.